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PRIVATE PLACEMENT OFFERING (Details 3) (USD $)
3 Months Ended 12 Months Ended
Mar. 31, 2015
Dec. 31, 2014
Warrants outstanding      
Exercise price      
Annual dividend yield      
Risk-free interest rate      
Expected volatility      
At transaction date    
Warrants outstanding   6,909,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNonOptionEquityInstrumentsOutstandingNumber
/ us-gaap_SubsidiarySaleOfStockAxis
= cpka_AtTransactionDateMember
Exercise price   $ 0.15us-gaap_FairValueAssumptionsExercisePrice
/ us-gaap_SubsidiarySaleOfStockAxis
= cpka_AtTransactionDateMember
Annual dividend yield   4.01%us-gaap_FairValueAssumptionsExpectedDividendRate
/ us-gaap_SubsidiarySaleOfStockAxis
= cpka_AtTransactionDateMember
Expected life (years)   5 years
Risk-free interest rate   4.14%us-gaap_FairValueAssumptionsRiskFreeInterestRate
/ us-gaap_SubsidiarySaleOfStockAxis
= cpka_AtTransactionDateMember
Expected volatility   53.94%us-gaap_FairValueAssumptionsExpectedVolatilityRate
/ us-gaap_SubsidiarySaleOfStockAxis
= cpka_AtTransactionDateMember